From 82c9edbf4148365f529a9b49013691943eed7aac Mon Sep 17 00:00:00 2001
From: Steven Barth <steven@midlink.org>
Date: Sun, 12 May 2013 11:03:48 +0200
Subject: [PATCH] Add support for DS-Lite AFTR

---
 src/dhcpv6.c  | 17 +++++++++++++----
 src/odhcp6c.h |  2 ++
 src/script.c  |  4 +++-
 3 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index df73c86..d2cd656 100644
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -136,12 +136,15 @@ int init_dhcpv6(const char *ifname, int request_pd)
 	}
 
 	// Create ORO
-	uint16_t oro[] = {htons(DHCPV6_OPT_DNS_SERVERS),
+	uint16_t oro[] = {
+			htons(DHCPV6_OPT_SIP_SERVER_D),
+			htons(DHCPV6_OPT_SIP_SERVER_A),
+			htons(DHCPV6_OPT_DNS_SERVERS),
 			htons(DHCPV6_OPT_DNS_DOMAIN),
 			htons(DHCPV6_OPT_NTP_SERVER),
-			htons(DHCPV6_OPT_SIP_SERVER_A),
-			htons(DHCPV6_OPT_SIP_SERVER_D),
-			htons(DHCPV6_OPT_PD_EXCLUDE)};
+			htons(DHCPV6_OPT_AFTR_NAME),
+			htons(DHCPV6_OPT_PD_EXCLUDE),
+	};
 	odhcp6c_add_state(STATE_ORO, oro, sizeof(oro));
 
 
@@ -694,6 +697,7 @@ static int dhcpv6_handle_reply(enum dhcpv6_msg orig,
 		odhcp6c_clear_state(STATE_SNTP_FQDN);
 		odhcp6c_clear_state(STATE_SIP_IP);
 		odhcp6c_clear_state(STATE_SIP_FQDN);
+		odhcp6c_clear_state(STATE_AFTR_NAME);
 	}
 
 	// Parse and find all matching IAs
@@ -779,6 +783,11 @@ static int dhcpv6_handle_reply(enum dhcpv6_msg orig,
 			if (r->protocol == 3 && r->algorithm == 1 &&
 					r->reconf_type == 1)
 				memcpy(reconf_key, r->key, sizeof(r->key));
+		} else if (otype == DHCPV6_OPT_AFTR_NAME && olen > 3) {
+			size_t cur_len;
+			odhcp6c_get_state(STATE_AFTR_NAME, &cur_len);
+			if (cur_len == 0)
+				odhcp6c_add_state(STATE_AFTR_NAME, odata, olen);
 		} else if (otype != DHCPV6_OPT_CLIENTID &&
 				otype != DHCPV6_OPT_SERVERID) {
 			odhcp6c_add_state(STATE_CUSTOM_OPTS,
diff --git a/src/odhcp6c.h b/src/odhcp6c.h
index cfd1a53..b0a1980 100644
--- a/src/odhcp6c.h
+++ b/src/odhcp6c.h
@@ -51,6 +51,7 @@ enum dhcvp6_opt {
 	DHCPV6_OPT_NTP_SERVER = 56,
 	DHCPV6_OPT_SIP_SERVER_D = 21,
 	DHCPV6_OPT_SIP_SERVER_A = 22,
+	DHCPV6_OPT_AFTR_NAME = 64,
 	DHCPV6_OPT_PD_EXCLUDE = 67,
 };
 
@@ -177,6 +178,7 @@ enum odhcp6c_state {
 	STATE_RA_ROUTE,
 	STATE_RA_PREFIX,
 	STATE_RA_DNS,
+	STATE_AFTR_NAME,
 	_STATE_MAX
 };
 
diff --git a/src/script.c b/src/script.c
index 051718f..2c62bf2 100644
--- a/src/script.c
+++ b/src/script.c
@@ -198,7 +198,7 @@ void script_delay_call(const char *status, int timeout)
 void script_call(const char *status)
 {
 	size_t dns_len, search_len, custom_len, sntp_ip_len, sntp_dns_len;
-	size_t sip_ip_len, sip_fqdn_len;
+	size_t sip_ip_len, sip_fqdn_len, aftr_name_len;
 
 	odhcp6c_expire();
 	if (delayed_call)
@@ -211,6 +211,7 @@ void script_call(const char *status)
 	uint8_t *sntp_dns = odhcp6c_get_state(STATE_SNTP_FQDN, &sntp_dns_len);
 	struct in6_addr *sip = odhcp6c_get_state(STATE_SIP_IP, &sip_ip_len);
 	uint8_t *sip_fqdn = odhcp6c_get_state(STATE_SIP_FQDN, &sip_fqdn_len);
+	uint8_t *aftr_name = odhcp6c_get_state(STATE_AFTR_NAME, &aftr_name_len);
 
 	size_t prefix_len, address_len, ra_pref_len, ra_route_len, ra_dns_len;
 	uint8_t *prefix = odhcp6c_get_state(STATE_IA_PD, &prefix_len);
@@ -227,6 +228,7 @@ void script_call(const char *status)
 		fqdn_to_env("DOMAINS", search, search_len);
 		fqdn_to_env("SNTP_FQDN", sntp_dns, sntp_dns_len);
 		fqdn_to_env("SIP_DOMAIN", sip_fqdn, sip_fqdn_len);
+		fqdn_to_env("AFTR", aftr_name, aftr_name_len);
 		bin_to_env(custom, custom_len);
 		entry_to_env("PREFIXES", prefix, prefix_len, ENTRY_PREFIX);
 		entry_to_env("ADDRESSES", address, address_len, ENTRY_ADDRESS);
-- 
2.39.2